Question about Kenmore 25512/ 25513 Progressive Canister Vacuum
I turn the vacuum on and withing seconds smell burning. That is without the handle, the actual brush that we use for vacuuming. That is not connected so it is not the roller, or the rubber band that holds it. I has to be the motor. Coincidentally, I just put a new bag in, and I used an off brand, but it fits and it does not seem to be coming from there. It is not making any odd noises.
We had this same issue. I noticed it smells like burning plastic. I took it apart and did not find any fundamental problems. Ball bearings on motor are fine, no play.
What I did find was that the motor construction contains lots of plastic. It's made in China. Even the brush holder is plastic. Now, this is unusual to me, as brushes get very hot. However, I did not find any issues of melted or softening plastic when running. I used a laser-guided thermometer and measured about 170 degrees F on the metal portion of the brush holder. Nothing unusual. Some parts reached above 200 degrees F. Again, nothing unusual. The only unusual issue is that many of the parts are mated with plastic parts. That's where I believe the problem lies.
When the motor is new, the brushes don't make full contact. Therefore, full power draw is not achieve until these brushes wear down a bit. After this point, the brushes reach maximum power delivery and reach maximum temperatures. This is why I believe the vacuum didn't exibit any smell until a few months later, at least, for us.
In conclusion, I didn't find anything wrong, except that the motor is cheaply constructed. It isn't going bad and well likely last quite a while, IMHO.
Posted on Jul 18, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
a burning smell is usually an indication that the belt is slipping. It may just be worn out or the brush and or bearings may be bound up with hair. Remove the brush cover, some are on top other on the bottom, and look for anything wrapped around the brush. Also look at the belt where it goes around the drive spindle, if you see small black specks the belt needs to be replaced. Check the brush fro free movement, if it dosen't spin easly the bearings may need cleaning.
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